The Ultimate
Utility Platform
Free calculators for everyone. Powerful APIs for developers. Open source, community-driven, and designed for speed.
Explore our modules
💰Finance
Compound interest, amortization schedules, ROI, and loan calculators.
👥Payroll
Net salary, withholding, overtime, and labor cost estimators.
🔄Conversion
Real-time currency, units, time zones, and physics conversions.
🛠️DevTools
JSON formatters, Base64, UUID generation, hashes, and more.
📝Text Tools
Word count, case converter, lorem ipsum.
❤️Health
BMI, BMR, and body stats.
➗Math
Percentages, random numbers, simple solvers.
✅Validators
IBAN, Credit Cards, Email checks.
📈Business
Break-even point, margin analysis, and pricing simulators.
API-First Design
Every calculation available on the web is also exposed via our high-performance REST API. Perfect for integrating into your own SaaS, mobile apps, or internal tools.
- ✓ Free for development
- ✓ OpenAPI / Swagger documentation
- ✓ High availability & caching
GET /api/v1/finance/simple-interest?principal=1000&rate=0.05&time=2
// Response
{
"result": 100,
"totalAmount": 1100,
"currency": "USD",
"meta": {
"computationTime": "2ms"
}
}